Prolactin is produced by the pituitary gland and normally rises during pregnancy and breastfeeding to support milk production. Outside of these situations, a persistently raised prolactin level (hyperprolactinaemia) can suppress FSH and LH, leading to irregular or absent ovulation and, in men, reduced testosterone and sperm production. Common causes include a pituitary microadenoma, hypothyroidism, certain medicines, and stress or breast stimulation shortly before testing, so blood is usually taken fasting and away from breast examination.
Also known as: prolactin test, high prolactin
Related India guides
Sources
- Indian Council of Medical Research (icmr.gov.in)
- Federation of Obstetric and Gynaecological Societies of India (fogsi.org)
Last reviewed: 9 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.